Intake manifold for internal-combustion engines



Nov. 27, 1923 -H. LE V. HORNING INTAKE MANIFOLDYFOR INTERNAL COMBUSTIONENGINES Filed June 4, 1917 Patented Nov. 27, 1923..

HARRY LE VAN BURNING, OF WAUKESHA, WISCONSIN, ASSIGNOR T0 WAUKESHA MOTOR('30., OF WAUKESHA, WISCONSIN, A CORPORATION OF WISCONSIN. I

INTAKE MANIFOLD FOR INTERNAL-COMBUSTION ENGINES.

Application filed June 4,

T 0 all whom it may concern:

Be it known that I, HARRY Ln VAN HoRNrNo. a citizen of the UnitedStates, residing at lVaukesha, in the, county of \Yaukesha and State ofWisconsin, have invented a certain new and useful Improvement in IntakeManifolds for Internallombustion Engines; of which the following is afull, clear, concise, and exact description, reference being had to theaccompanying drawings, forming a part of this specification.

The present invention relates broadly to internal combustion engines andhas particular reference to an improved form of intake manifold for vusein connection therewith.

In the use of a forked intake manifold the direction of flow of theexplosive mixture in the arms of the manifold must be reversed when thecylinders at opposite ends of said arms alternately open and draw in themixture. This results in a loss of energy topropel the gas and causes achange in at direction as well as a pulsation of the gas column whichdestroys the homogeneity'of the mixture and unbalances the correctdistribution of the charge.

With the errors of the prior art in mind I have designed the manifold ofmy invention with an object to overcome the defects of the prior deviceswhereby to maintain a uniform flow of explosive mixture which is of thehighest quality and suflicient in quantity to perform the duties placedupon the same, as well as to correctly distribute the charge.

A further object .of my invention is to provide an intake manifoldwhich, while embodying all the improvements of my invention, may bereadily applied to an internal combustion engine in place of themanifold now in use, Without material alteration of the enginestructure.

I have also provided means for speeding up the mixture as the samepasses through the manifold just before reaching each of the cylinderports.

Other objects and advantages ofv my invention will appear from thefollowing detailed description and the claims, taken in connection withthe accompanying drawinip, in whichv igure 1 is a top plan view of aninternal device.

1 917. Serial No. 172,623.

' combustion engine showingmy improved manifold applied thereto; and

Figure 2 is a'side elevational view of the same, the manifold beingshown in section.

In the drawings I have illustrated the cylinder structure of a standardfour-cylinder internal combustion engine, the cylinders being cast enbloc in pairs designated C and C. A common cylinder head H is employedfor both pairs of cylinders. The upper ends of the cylinders arejacketed to form the intake and outlet portions to which the intake andoutlet manifolds are connected. The construction of the engine proper isstandard and need not be dwelt upon further.

The intake manifold of my invention is best shown in Figure 2 andconsists of a horizontal conduit section-10 provided with an elbow 11and a downwardly extending portion 12, the latter being connected to thecarbureter 13 or other mixture forming The conduit section 10 is formedwith alateral extension 14 onits free end, said extension beingconnected as at 15 to the jacket of the cylinder block C.

In order to connect the intake manifold to the adjoining cylinder block,a second extension 16 is provided connected at 17 to the jacket of thecylinder block C. The respective bores of the extensions 14 and 16connect with the bore of the manifold 10 as at 18 and 19, and slightlyin advance of the extensions 14 and 16 the manifold is formed withconstricted portions 20 and 21 embodying the principle and function of aVenturi throat. In this manner the inertia of the gas. when entering.may be taken advantage of in order to pack. the charge into thecylinder. Itwill be noted from Figure 1 that the intake manifold is spa-ed a sufficient distance from the engine cylinder structure to permitlocation of the exhaust. manifold.

The manifold of my invention may be readily installed on any standardtype of internal combustion engine and embodies broadly the idea of astraight distributing arm receiving an explosive mixture from one endonly as distinguished from the forked manifold which receives the chargeat the intermediate portion and distributes it to each end. Incombination with the straight manifold receiving an explosive mixture onone end only I provide the Venturi or constricted portions which/tend toenhance the efliciency of the device. Of course, it may be desirable insome cases to omit the Venturithroats and therefore I do not limitmyself to the use of the same.

While I have shown and described my invention as embodying a specificstructure, it is to be understood that I do not limit myself to thedetails but reserve the right to make changes therein such as do notdepart from the spirit and scope of the invention as claimed.

I claim:

1. In combination, an intake conduit section having lateral extensionsat various dis tances from the end, said extensions having borescommunicating with the bore of the conduit, means to introduce anexplosive mixture to one end only of said conduit, and Venturi throatsin said conduit one in advance of each of said lateral bores.

2. In combination, a straightiintake manifold adaptedto receive anexplosive mixture newness at one end thereof only, a plurality ofoutlets at various distances from the end along the sides of themanifold for connection to the combustion chambers of an internalcombustion engine, the bore of said manifold having constricted portionstherein one in advance of each of said outlets.

3. In combination, an intake manifold having a straight distributing armprovided with a bore, a plurality of lateral extensions at variouspoints on said arm provided each with a bore communicating with saidfirst bore, means to introduce an explosive mixture at one end only ofsaid firstbore, said bore having constricted portions therein one inadvance of each of the lateral bores, and means to fasten saidextensions to the cylinder structure of an internal combustion enginetoafi'ord communication between the distributing arin and the combustionchambers of the engine.

In witness whereof, I hereunto subscribe my name this 31st day of May,A. D. 191-7.

HARRY LE VAN HURNING.

